Vaisvilkas I of Lithuania

Vaisvilkas I of Lithuania (1238-1280) was the Grand Duke of Lithuania from 1263 to 1280, succeeding Mindaugas.

Biography
Vaisvilkas became the Grand Duke after the death of Mindaugas, and in his early years as Grand Duke, he fought against the Mongol Empire. However, from 1277 onwards he had to fight against the Grand Duchy of Novgorod, which conquered many of his provinces. He was killed in the siege of Dokshitsy in 1280.